Vacuum cover

ABSTRACT

Disclosed herein is a vacuum cover, which is coupled to an object to define storage space isolated from the exterior, and moves in a direction that reduces the volume of the storage space due to its elasticity, thus discharging air from the storage space, therefore improving sealing ability and preventing food stored in the storage space from contacting the air. The vacuum cover is made of elastomer, such as silicone rubber, and integrally has a member for air-tightly contacting an object or a valve for supplying or exhausting the air. The vacuum cover includes an elastic body, which isolates storage space from an exterior and is deformed so that air is exhausted from or supplied to the storage space, and a valve provided at a predetermined position on the body to discharge and/or supply the air from and/or to the storage space.

TECHNICAL FIELD

The present invention relates, in general, to a vacuum cover, which iscoupled to an object, namely, a vessel, such as a dish or a bowl, todefine a storage space isolated from the exterior, and which moves in adirection of reducing the volume of the storage space due to itselasticity, thus discharging air from the storage space, thereforeimproving sealing ability and preventing food stored in the storagespace from contacting air so that the food can be kept for a long timeand, more particularly, to a vacuum cover, which is made of elastomer,such as silicone rubber, and which integrally has a member forair-tightly contacting an object or a valve for supplying or exhaustingthe air, unlike a conventional vacuum cover manufactured by assemblingindividual members with each other, thus preventing the residue of foodfrom being caught between the members and preventing the food fromaccumulating between the members, therefore being sanitary, and whichdoes not use synthetic resin, unlike conventional covers for foodvessels, thus preventing the generation of endocrine disruptors which iscurrently an issue, therefore appealing to consumers.

Recently, a vacuum vessel which is evacuated to create a vacuum in thevessel, in addition to serving as an airtight vessel, has appealed toconsumers. Air is discharged from the vessel, which is used to storefood, for example, fruit, vegetables, or leftover side dishes, thusdelaying the oxidation of the food by aerobic microorganisms, thereforeextending the expiration period of the stored food.

Further, air is exhausted from the vacuum vessel, thus preventing foodfrom emitting odors and preventing the odors from permeating other food.

BACKGROUND ART

Vacuum vessels are classified into a vacuum vessel from which air isexhausted using a separately provided vacuum device, such as a motorpump, and a vacuum vessel which has an exhaust piston, such as asyringe, on the vessel itself. The former vacuum vessel is disclosed inKorean U.M. Registration No. 0395836 which was filed by An JunYoung, wasregistered on Sep. 7, 2005, and is entitled └Cover For Vacuum Vessel┘.

The latter vacuum vessel is disclosed in Korean U.M. Registration No.0402438, which was filed by Kim HyungJun et al., was registered on Nov.24, 2005, and is entitled └Vacuum Packing Vessel┘.

However, the above-mentioned vacuum vessels have a drawback in that theyare complicated to use. Thus, the vacuum vessels substitute for simpleairtight vessels, and have not achieved great commercial success.

In addition to the vacuum vessels disclosed in the two documents, anelastic cover has been proposed. The vacuum level achieved using theelastic cover is lower than the vacuum level achieved by the abovevacuum vessels, which use the separately provided vacuum devices.However, the main object of the elastic cover is to afford convenientuse. Further, the elastic cover can discharge the air from a vessel,thus delaying the oxidation of food.

Such an elastic cover is disclosed in Korean U.M. Registration No.0389341, which was filed by Kim JaeYeon, was registered on Jul. 1, 2005,is entitled └Airtight Cover for Compressing and Evacuating Vessel┘, andincludes a hard upper compressing cover and a lower lap cover made ofsilicone material, and Korean Patent No. 0526358, which was filed bySaeSam, Inc., was registered on Oct. 28, 2005, is entitled └Cover forVessels┘, and has a corrugated part for flexibility. The elastic coveraccording to the cited documents moves in a direction of reducing thevolume of storage space defined by the coupling of the vessel with thecover, thus discharging air from the storage space.

However, the elastic vacuum cover, performing the pumping function, mustsatisfy the following requirements so as to create new demand orsubstitute for an existing airtight vessel, for example, a vesseldisclosed in Korean Patent No. 0452886, which was filed by HanaCobi,Inc., was registered on Oct. 5, 2004, and is entitled └Airtight FoodVessel Having Handle┘.

That is, the food vessel and cover, which have superior sealing ability,contain no material that produces endocrine disruptors, that is,so-called “environmental hormones”, for example, polystyrene oligomersof a plastic product, bisphenol A, a phthalic acid compound, used as aplasticizer, and others, and in addition, do not use organic syntheticresin, are required.

Meanwhile, a vessel, which is made of heat-resistant glass, so that itdoes not produce environmental hormones, has come onto the market andappealed to consumers. However, the cover is still made of syntheticresin, in consideration of a cost and sealing ability.

DISCLOSURE Technical Problem

Accordingly, the present invention has been made keeping in mind theabove problems occurring in the prior art, and the present inventionprovides a vacuum cover, which does not produce environmental hormones,ensures the sealing ability of an existing airtight vessel, and createsa vacuum in storage space, thus preventing the oxidation of food.

To this end, an object of the present invention is to provide a vacuumcover, which is made of elastomer, especially silicone rubber, so thatno environmental hormones are produced, and which has high heatresistance, so that the vacuum cover is not deformed, or the sealingability of the vacuum cover is not lowered but is maintained, thuspreventing the leakage of food, even when the vacuum cover is put into amicrowave oven or when hot food is covered with the vacuum cover.

Another object of the present invention is to provide various models ofvacuum covers, which are applicable to various objects, that is, abowl-type vessel, a dish-type vessel, or a table covered with a glasspanel.

A further object of the present invention is to provide a vacuum cover,in which a skirt or a sealing protrusion provided on a surfacecontacting a corresponding object to increase the sealing ability isintegrated with a cover body, and in addition, a valve for supplying orexhausting the air into or from storage space is integrated with thecover body, thus preventing food from being caught or accumulating in agap between a packing ring and a cover, therefore preventing the vacuumcover from being soiled and being unsanitary, unlike a conventionalairtight vessel, which is constructed so that the packing ring iscoupled to (attached to or press-fitted into) the cover.

Yet another object of the present invention is to provide a vacuumcover, in which respective parts are made of material having the samephysical properties, but have different thicknesses, thus increasingsealing ability (thick part—skirt portion), ensuring the sealing abilitythrough rapid engagement and strong coupling force when a valve isopened and thereafter is restored to its original position (thickpart—united valve), and allowing a part to change its shape when anevacuating operation is performed (thin part—edge portion), thereforeallowing the part to come into contact with a corresponding object onceagain, in addition to the original contact of the edge with the object.As such, different thicknesses are provided to the respective parts,thus providing various functions.

Technical Solution

In order to accomplish the objects, the present invention provides avacuum cover, including an elastic body, isolating storage space from anexterior, and deformed so that air is exhausted from or supplied to thestorage space; and a valve provided at a predetermined position in thebody to discharge and/or supply the air from and/or to the storagespace.

For a united valve, the valve includes a protruding press part, and anair inlet/exhaust part formed by incising an upper surface of the presspart.

Preferably, an exhaust passage facing the air inlet/exhaust part isshaped so that an upper portion of the exhaust passage is narrow and alower portion of the exhaust passage is wide.

For a disunited valve, the valve includes a coupling part inserted intoa valve mounting hole of the body, a support part contacting a lowersurface of the body and positioned under the coupling part, and ashutting part placed on an upper surface of the body and shutting an airdischarge hole formed in the body.

The coupling part of the valve has a length such that it is movable upand down relative to the body.

The valve further includes a grip part provided on an upper portion ofthe shutting part.

In order to enhance sealing ability, a sealing protrusion is provided ata predetermined position on the body that contacts a correspondingobject, which defines the storage space isolated from the exterior alongwith the body, and an air layer is defined between the sealingprotrusion and the corresponding object. Further, removal preventionparts are provided on a predetermined position on the correspondingobject, defining the storage space, isolated from the exterior alongwith the body, and a predetermined position on the body, which contactsthe corresponding object, and are coupled to each other through amale-female-coupling method. Preferably, a skirt extends from an outeredge of the body.

A thin part is provided inside the edge of the body contacting thecorresponding object which defines the storage space, isolated from theexterior along with the body, so that the thin part additionallycontacts the corresponding object, thus increasing sealing ability.

ADVANTAGEOUS EFFECTS

As described above, according to the present invention, a vacuum coveris made of elastomer, especially silicone rubber, so that noenvironmental hormones are produced, and which has high heat resistance,so that the vacuum cover is not deformed, or the sealing ability of thevacuum cover is not lowered but is maintained, thus preventing theleakage of food, even when the vacuum cover is put into a microwave ovenor when hot food is covered with the vacuum cover. The present inventionprovides various models of vacuum covers, which are applicable tovarious objects, that is, a bowl-type vessel, a dish-type vessel, or atable covered with a glass panel. Further, a skirt or a sealingprotrusion provided on a surface contacting a corresponding object toincrease the sealing ability is integrated with a cover body, and inaddition, a valve for supplying or exhausting the air into or fromstorage space is integrated with the cover body, thus preventing foodfrom being caught or accumulating in a gap between a packing ring and acover, therefore preventing the vacuum cover from being soiled and beingunsanitary, unlike a conventional airtight vessel, which is constructedso that the packing ring is coupled to (attached to or press-fittedinto) the cover. Further, respective parts are made of material havingthe same physical properties, but have different thicknesses, thusincreasing sealing ability (thick part—skirt portion), ensuring thesealing ability through rapid engagement and strong coupling force whena valve is opened and thereafter is restored to its original position(thick part—united valve), and allowing a part to change its shape whenan evacuating operation is performed (thin part—edge portion), thereforeallowing the part to come into contact with a corresponding object onceagain, in addition to the original contact of the edge with the object.As such, different thicknesses are provided to the respective parts,thus providing various functions.

DESCRIPTION OF DRAWINGS

FIG. 1 is a sectional view showing the state where a dome-type vacuumcover (having a united valve) according to the first aspect of thepresent invention is coupled to a dish-type vessel which is one kind ofcorresponding object and defines storage space along with the vacuumcover;

FIG. 2 is a sectional view illustrating the operation of supplyingexternal air so as to separate the vacuum cover and the vessel, whichare coupled to each other as shown in FIG. 1;

FIG. 3 is a view illustrating the vacuum cover of FIG. 1, according tothe first aspect of the present invention, in a plan view and a bottomview;

FIG. 4 is a sectional view showing the state where the dome-type vacuumcover (having the united valve) according to the first aspect of thepresent invention is applied to a bowl-type vessel;

FIG. 5 is a schematic bottom view showing modifications of an airinlet/exhaust part of the united valve of the vacuum cover;

FIGS. 6, 7, 8, and 9 are sectional views showing several modificationsof a flat-type vacuum cover (having a united valve) according to thesecond aspect of the present invention, and showing the state where theflat-type vacuum cover is coupled to a bowl-type vessel;

FIGS. 10 and 11 are a plan view and a sectional view showing the statewhere a vacuum cover having a disunited valve according to the thirdaspect of the present invention is coupled to a bowl-type vessel; and

FIG. 12 is a sectional view showing important parts of a vacuum coverhaving a disunited valve, in which the valve of the vacuum cover isdifferent from the valve of FIG. 11 in that it is provided with a grippart.

DESCRIPTION OF REFERENCE CHARACTERS OF IMPORTANT PARTS

Ccd, Cif, Ccf, Ccf′: vacuum cover Bcd, Bif, Bcf: cover body 11: skirt12: removal prevention part 13: sealing protrusion 13A: flange 13a: airlayer 14: thin part 15: depressed part 16: valve mounting hole 17, 17A:air discharge holes Vu, Vd: valve 21: protruding press part 21a: thickpart 22, 22A: air inlet/exhaust part 22a: exhaust passage 23: shuttingpart 23A: grip part 25: support part 25A: exhaust slit 27: coupling part

Best Mode

Hereinafter, the present invention will be described in detail withreference to the accompanying drawings.

The same reference numerals throughout the drawings denote elementshaving the same function. If there is no special mention otherwise, theelements denoted by the reference numerals are to be comprehended asbeing elements complying with the above-mentioned reference scheme.

A cover according to the present invention may be classified into adome-type cover and a flat-type cover according to the shape thereof.

Further, a corresponding object, which is coupled to the vacuum coveraccording to the present invention and defines a storage space isolatedfrom the exterior, is classified into an inscribed-type object and acircumscribed-type object according to the form of the contact of theobject with the edge of the cover. The inscribed-type object isconstructed so that the edge of the cover contacts the inner surface ofthe object. The circumscribed-type object is constructed so that theedge of the cover contacts the outer surface of the object (therefore,terms ‘inscribed’ and ‘circumscribed’ are defined on the basis of theobject). The reference numerals for the cover are set according to theabove reference-scheme (Ccd, Cif, Ccf, and Ccf′).

Valves which are used to exhaust the air from storage space or to supplythe air into the storage space are classified into a united valve and adisunited valve, which are denoted by different reference numerals Vuand Vd. The united valve is integrated with the cover through injectionmolding. The disunited valve is manufactured separately from the coverthrough double injection molding, and is coupled to the cover.

In the present invention, an article coupled to the vacuum cover may bea vessel, such as a bowl or a dish. A dome-type cover Ccd of FIG. 1covers a smooth surface (e.g.: glass panel) provided on a table, thusdefining storage space. In order to include all articles which may becovered with the vacuum cover, the term ‘corresponding object’ is usedherein.

Herein, the term ‘skirt’ 11 denotes a part which extends from an edge ofa body of each model of vacuum cover and surrounds the outer surface ofthe vessel.

The body and/or the valve of the vacuum cover according to the presentinvention use elastomer, especially silicone rubber, which does notproduce environmental hormones and has high heat resistance.

Owing to the elasticity of the material, the vacuum cover can serve as apump for exhausting air from the storage space or supplying air into thestorage space.

First, a vacuum cover Ccd of FIGS. 1, 2, 3, 4, and 5 is provided with adome-type vacuum cover, according to the first aspect of the presentinvention, and a united valve.

Referring to FIGS. 1 and 2, the vacuum cover Ccd is the model whichcovers a dish-type vessel or completely covers a vessel that containsfood therein and is placed on a glass panel of a dining table.

Referring to the drawings, a cover body Bcd has a dome shape, and askirt 11 is provided on an edge of the body to surround the lowerportion of the outer portion of a dish-type vessel Cd. Further, aremoval prevention part 12 is provided at a predetermined position onthe body, and is coupled to the vessel through a male-female-couplingmethod.

The cover body Bcd defines storage space S isolated from the exterior,along with a corresponding object, especially, the dish-type vessel Cd.

When the cover body Bcd is pressed, so that air is discharged from thestorage space S through the edge of the body or through a valve Vu, thevolume of the storage space is reduced. At this time, the cover bodymade of the elastomer is contracted.

As the air is discharged from the storage space S, the coupling force ofthe dish-type vessel Cd with the cover is increased (particularly, evenif vertical force acts on the cover, it is difficult to separate thecover from the vessel because of the coupling construction of thedish-type vessel, the removal prevention part 12 of the body, and theskirt 11).

Since the cover body contracts, a part 14 which is thinner than otherparts arranged inside the edge of the body Bcd contacts the uppersurface of the dish-type vessel Cd. Thus, the thin part 14 can perform adouble sealing function along with the removal prevention part 12.

A united valve Vu, which is formed through injection molding, isintegrally provided on the upper portion of the center of the body Bcd.A depressed part 15 is formed around the valve to prevent the valve Vufrom projecting out.

The valve Vu may be used to discharge and/or supply gas from and/or tothe storage space S. When the valve Vu and the body Bcd of the dome-typecover Ccd are pressed, air is discharged from the storage space throughthe gap between the edge of the body and the vessel Cd. As necessary,the valve may be mainly used to supply gas to the storage space, and thegas may be discharged through the gap between the edge of the body andthe vessel Cd by pressing the body Bcd.

The valve Vu includes a protruding press part 21 and an airinlet/exhaust part 22. The protruding press part is surrounded by thedepressed part 15 of the body and maintains a height which is similar tothat of the upper surface of the body. The upper surface of the presspart 21 is incised, thus providing the air inlet/exhaust part 22.

As shown in circle “A” of FIG. 1, the air inlet/exhaust part 122 isformed by vertically incising the upper surface of the press part, andextends in a straight line, as shown in the plan view of FIG. 3A and thebottom view of FIG. 3B.

When a user desires to separate the cover Ccd, according to the firstaspect, from the dish-type vessel Cd, the press part 21 is pressed.Especially, as shown in FIG. 2, both ends of the air inlet/exhaust part22 are pressed in the direction of the incision to open it. In thisstate, air is supplied to the storage space, so that the cover can beseparated from the vessel.

The press part 21 of the valve Vu has the shape of a truncated cone. Anexhaust passage 22 a facing the air inlet/exhaust part 22 is shaped suchthat the upper portion thereof is narrow and the lower portion thereofis wide. In a detailed description, as shown in circle “B” of FIG. 1,the exhaust passage has the shape of a house having a roof.

Since the exhaust passage 22 a is shaped such that the upper portionthereof is narrow and the lower portion thereof is wide, the portionadjacent to the air inlet/exhaust part 22 has a thicker wall, thusproviding a thick part 21 a. Thus, elasticity easily acts in thedirection in which the air inlet/exhaust part 22 of the valve closes, sothat rapid engagement and strong coupling force are ensured when thevalve is opened and thereafter is restored to its original state.

FIG. 4 shows the state where the vacuum cover of FIG. 1 according to thefirst aspect is applied to a bowl-type vessel Cb. The thin part 14 isprovided around the edge of the body Bcd. Thus, when the storage spaceis evacuated, the lower surface of the thin part contacts the innersurface of the upper end of the vessel Cb, so that sealing ability isincreased.

Further, circle “C” of FIG. 1 shows a modification of the vacuum coverCcd according to the first aspect of the present invention. As shown inthe drawing, an air inlet/exhaust part 22A of the valve Vu is inciseddiagonally rather than vertically, thus more effectively preventing thevertical flow of air.

FIG. 5 shows various air inlet/exhaust parts 22A of the valve. FIG. 5Ashows a toothed air inlet/exhaust part, FIG. 5B shows a curved airinlet/exhaust part, FIG. 5C shows an air inlet/exhaust part which isincised to have two lines, and FIG. 5D shows an air inlet/exhaust partwhich is incised to have two brackets. These air inlet/exhaust partsimprove sealing ability when being closed.

FIG. 6 shows a flat-type vacuum cover Cif according to the second aspectof the present invention. The vacuum cover is provided with a unitedvalve Vu, and is constructed so that the edge of the vacuum covercontacts the inner surface of a bowl-type vessel Cd.

Referring to FIG. 6, a cover body Bif has a depressed part 15 around thevalve Vu. A sealing protrusion 13 is provided on the body in such a wayas to contact the inner surface of the bowl-type vessel Cd, which is onekind of corresponding object. Further, an air layer 13 a is definedbetween the sealing protrusion and the vessel Cd, so that the sealingability is improved.

The air layer 13 a is surrounded with a flange 13A and the sealingprotrusion 13 of the cover body Bif and the inner wall of the vessel Cb.When the sealing protrusion 13 comprises two or more sealingprotrusions, another air layer is formed by the protrusions and theinner wall of the vessel.

Moreover, the flange 13A of the cover body protrudes further out of thevessel, thus serving as a grip part when the cover is separated from thevessel. The flange 13A is thicker than other parts. This constructionreduces the consumption of material and provides sufficient supportforce to prevent the cover from entering the vessel even when the cover,placed on the upper end of the vessel, is pressed to create a vacuum inthe storage space S.

When the cover body Bif is pressed to discharge air from the storagespace S, the air is discharged through the valve and/or the gap betweenthe edge of the body and the vessel.

Unlike the vacuum cover of FIG. 6, FIG. 7 shows a vacuum cover which isconstructed to cover the outer surface of the bowl-type vessel Cb. Asealing protrusion 13 and an air layer 13 a are formed to be suitablefor the modified vacuum cover.

Unlike the vacuum cover of FIG. 7, FIG. 8 shows a vacuum cover which isconstructed so that a thin part 14 is provided around an edge 13A. Thus,when storage space S is evacuated, the thin part 14 comes into closecontact with the inner wall of the upper portion of the bowl-type vesselCb.

The vacuum cover of FIG. 9 has a shape that is intermediate between thevacuum covers of FIGS. 6 and 7, and is different from the vacuum coversof FIGS. 6 and 7 in that it is provided with an extension sleeve 11Acontacting the inner surface of the vessel, in addition to having askirt 11 that surrounds the outer surface of the vessel Cb (Referencenumeral 12 a denotes a finger insertion gap).

FIGS. 10 and 11 are a plan view and a sectional view showing the statewhere a vacuum cover having a disunited valve Vd according to the thirdaspect of the present invention is coupled to a bowl-type vessel.

FIGS. 10A and 10B show a rectangular cover and a circular cover Ccf,which are suitable for rectangular and circular bowl-type vessels.

As shown in FIGS. 10 and 11, a continuous or discontinuous male removalprevention part 31 is provided on the outer circumference of the upperportion of the bowl-type vessel Cb. A female removal prevention part 12is provided on a body Bcf of the cover Ccf in such a way as to bepositioned on the inner circumference of a skirt 11, and engages withthe male removal prevention part 31.

Further, the inner surface of the lower portion of the skirt 11 isinclined, and the outer wall of the vessel Cb is also inclined. Thus,when the cover is coupled to the vessel, the finger insertion gap 12 ais defined in a junction between the cover and the vessel, so that it iseasy to separate the cover from the vessel.

An edge and the skirt 11 of the body Bcf of the cover Ccf are thickerthan inner portions of the cover body, thus allowing the cover to befirmly coupled to the vessel, therefore preventing the cover from beingseparated from the vessel, and increasing sealing ability.

Meanwhile, a valve mounting hole 16 is formed in the center of the bodyBcf, and four air discharge holes 17 are formed around the valvemounting hole 16.

The disunited valve Vd includes a coupling part 27, which is insertedinto the valve mounting hole 16 of the body Bcf, a support part 25,which contacts the lower surface of the body and is positioned under thecoupling part, and a shutting part 23, which is positioned on the uppersurface of the body and shuts the air discharge holes 17 formed in thebody. Such a valve is provided in a depressed part of the body, so thatthe valve does not protrude outwards.

When the body Bcf of the cover Ccf, coupled to the vessel, is pressed,so that air is discharged from the storage space S, the air is mainlydischarged through the air discharge holes 17 because of the position ofthe shutting part 23.

Further, in order to supply air to the storage space in advance beforethe separation of the cover from the vessel, a user has only to lift theshutting part 23 of the valve.

FIGS. 12A and 12B are sectional views showing important parts of vacuumcovers having disunited valves. The valves are different from the valveof FIG. 11 in that they have grip parts.

The valve Vd of FIG. 12A is different from the valve of FIG. 11 in thata grip part 23A simply protrudes from the valve.

The valve Vd of FIG. 12B is different from the valve of FIG. 11 in thatit has a grip part 23A, and in that a coupling part 27 has length suchthat it is movable up and down relative to a body Bcf. Further, an airdischarge hole 17A of the body Bcf of FIG. 12B collaterally serves as avalve mounting hole. Air is discharged through an exhaust slit 25Aformed in a support part 25 of the valve Vd and the air discharge hole17A of the body. When a user desires to discharge air from the storagespace or supply air to the storage space, the grip part 23A is pulled,so that the shutting part 23 is separated from the body Bcf.

Preferably, the valve of FIG. 12B is constructed so that undesirablerotation thereof is impossible, so that the exhaust slit 25A is alwaysaligned with the air discharge hole 17A of the body. To this end, thecoupling part 27 of the valve and the air discharge hole 17 of the bodyare formed such that they do not have circular sections, but havesemi-circular, triangular, or rectangular sections.

Further, it is preferable that the valve be stopped at positions wherethe shutting part 23 of the valve closes and opens the air dischargehole 17 of the body.

To this end, stoppers may be provided on upper and lower portions of thecoupling part 27 of the valve.

Although a description of known technology relating to physicalproperties of elastomer and harmless grades thereof, especially siliconerubber, has been omitted herein, those skilled in the art willunderstand such technology.

It should also be understood that the foregoing relates only to apreferred embodiment of the invention, and that it is intended to coverall changes and modifications of the example of the invention herein,chosen for the purposes of disclosure, which do not constitutedepartures from the spirit and scope of the invention.

1. A vacuum cover, comprising: an elastic body, isolating storage spacefrom an exterior, and deformed so that air is exhausted from or suppliedto the storage space; and a valve provided at a predetermined positionin the body to discharge and/or supply the air from and/or to thestorage space.
 2. The vacuum cover according to claim 1, wherein thevalve comprises a protruding press part, and an air inlet/exhaust partformed by incising an upper surface of the press part.
 3. The vacuumcover according to claim 2, wherein an exhaust passage facing the airinlet/exhaust part is shaped so that an upper portion of the exhaustpassage is narrow and a lower portion of the exhaust passage is wide. 4.The vacuum cover according to claim 1, wherein the valve comprises: acoupling part inserted into a valve mounting hole of the body; a supportpart contacting a lower surface of the body, and positioned under thecoupling part; and a shutting part placed on an upper surface of thebody, and shutting an air discharge hole formed in the body.
 5. Thevacuum cover according to claim 4, wherein the coupling part of thevalve has a length such that it is movable up and down relative to thebody.
 6. The vacuum cover according to claim 4, wherein the valvefurther comprises a grip part provided on an upper portion of theshutting part.
 7. The vacuum cover according to claim 1, wherein asealing protrusion is provided at a predetermined position on the bodythat contacts a corresponding object, which defines the storage spaceisolated from the exterior along with the body, and an air layer isdefined between the sealing protrusion and the corresponding object. 8.The vacuum cover according to claim 1, wherein removal prevention partsare provided on a predetermined position on the corresponding object,defining the storage space, isolated from the exterior along with thebody, and a predetermined position on the body, which contacts thecorresponding object, and are coupled to each other through amale-female-coupling method.
 9. The vacuum cover according to claim 1,wherein a skirt extends from an outer edge of the body.
 10. The vacuumcover according to claim 1, wherein the body has a dome shape.
 11. Thevacuum cover according to claim 10, wherein a thin part is providedinside the edge of the body contacting the corresponding object whichdefines the storage space, isolated from the exterior along with thebody.
 12. The vacuum cover according to claim 1, wherein a depressedpart is provided on the body to be positioned around the valve, andprevents the valve from projecting out.
 13. The vacuum cover accordingto claim 1, wherein the body is formed to have a single structurethrough injection molding, and is made of elastomer.
 14. The vacuumcover according to claim 1, wherein the body and the valve areintegrated into a single structure through injection molding, and aremade of elastomer.
 15. The vacuum cover according to claim 2, whereinthe air inlet/exhaust part of the valve has a diagonal shape.
 16. Thevacuum cover according to claim 3, wherein the air inlet/exhaust part ofthe valve has a diagonal shape.